<template>
  <div class="wrap">
    <el-form
      class="loginForm"
      :model="loginForm"
      :rules="loginFormRules"
      ref="loginFormRef"
      label-position="top"
    >
      <el-form-item label="手机号" prop="phone">
        <el-input v-model="loginForm.phone"></el-input>
      </el-form-item>
      <el-form-item label="手机验证码" prop="verificationCode">
        <el-input v-model="loginForm.verificationCode">
          <template slot="append">
            <el-button v-if="loginForm.showloginCode" type="primary" @click="getloginPhoneCode">获取验证码</el-button>
            <div v-else>{{ loginForm.count }}</div>
          </template>
        </el-input>
      </el-form-item>
      <el-form-item class="btns">
        <el-button type="primary" @click="login">登录</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
export default {
  data () {
    // 验证手机号是否合法
    var checkMobile = (rules, value, callback) => {
      const regMobile = /^(0|86|17951)?(13[0-9]|15[0123456789]|17[678]|18[0-9]|14[57])[0-9]{8}$/
      if (regMobile.test(value) === true) {
        return callback()
      } else {
        callback(new Error('请输入合法的手机号'))
      }
    }
    // 验证输入的手机号验证码是否和存储的验证码相同
    var checkPhoneCode = (rules, value, callback) => {
      if (value === this.loginForm.contenttext) {
        return callback()
      } else {
        callback(new Error('验证码错误'))
      }
    }
    return {
      // 表单
      loginForm: {
        phone: '',
        verificationCode: '', // 表单中展示的验证码
        contenttext: '', // 向手机号发送的随机验证码
        timer: null,
        showloginCode: true, // 判断展示‘获取验证码’或‘倒计时’
        count: '' // 倒计时时间
      },
      // 验证规则
      loginFormRules: {
        phone: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ],
        verificationCode: [
          { required: true, message: '请输入手机验证码', trigger: 'blur' },
          { validator: checkPhoneCode, trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 获取手机验证码
    getloginPhoneCode () {
      // 如果未输入手机号，结束执行
      if (this.loginForm.phone === '') {
        return
      }
      // 获取随机数（4位数字）
      var numCode = ''
      for (var i = 0; i < 4; i++) {
        numCode += Math.floor(Math.random() * 10)
      }
      // 存储发送的验证码,用于验证输入的手机验证码是否和本地存储的相同
      this.loginForm.contenttext = numCode
      // 向手机号发送验证码传入的参数
      let phoneCode = {
        phonenum: this.loginForm.phone,
        contenttext: '您正在修改密码，验证码为:' + numCode + '，切勿将验证码泄露给他人。'
      }
      // 调用接口，向手机号发送验证码
      this.$axios.post('接口地址', phoneCode).then((res) => {
        if (res.status !== 200) {
          return this.$message.error('验证码发送失败！')
        } else {
          // 当验证码发送成功，开始60秒倒计时
          const TIME_COUNT = 60
          if (!this.loginForm.timer) {
            this.loginForm.showloginCode = false
            this.loginForm.count = TIME_COUNT
            this.loginForm.timer = setInterval(() => {
              if (
                this.loginForm.count > 0 &&
                this.loginForm.count <= TIME_COUNT
              ) {
                this.loginForm.count -= 1
              } else {
                this.loginForm.showloginCode = true
                clearInterval(this.loginForm.timer)
                this.loginForm.timer = null
              }
            }, 1000)
          }
        }
      })
    },
    // 开始登录
    login () {
      this.$refs.loginFormRef.validate((valid) => {
        if (valid) {
          console.log('开始登录')
        } else {
          console.log('error submit!!')
        }
      })
    }
  }
}
</script>
<style scoped>
.loginForm {
  width: 500px;
  margin: 0 auto;
}
.btns {
  text-align: right;
}
</style>
